Explanation:

A shared lock allows which of the following types of transactions to occur? Correct Answer Read A shared lock allows which of the following types of transactions to occur - Read.

Explanation:

To divide a class C network into a maximum of 14 subnets -each capable of having up to 14 hosts , the subnet mask used should be : Correct Answer 255.255.255.240 A typical network class has 3 standard host ID sizes: Class A (24bits), Class B (16bits) and Class C (8bits). But in practice, these standard sizes are not economical. For instance, a 24bits host ID is capable of supporting a maximum of 2²¹ (2,097,152) host IDs. With few of these IDs in use, the rest becomes wasted resources. With subnetting however, we get to go beyond the standard host ID sizes and determine our own desired sizes. The basic meaning of a subnetwork is as the name suggests; a type of a smaller network gotten from the division of a network. They are created with the use of masking, just that this time around, the Host IDs are tweaked. For instance, the standard network masking for the Class C network, 207.17.5.0 is 255.255.255.0. This will give 2²¹ network IDs and (2⁸ – 2) hosts. 255.255.255.0 as used here is standard, but with subnetting, we could use 255.255.255.244.

Explanation:

The result of a SQL SELECT statement is a __ . Correct Answer table The SQL SELECT statement returns a result set of records from one or more tables. A SELECT statement retrieves zero or more rows from one or more database tables or database views. ... As SQL is a declarative programming language, SELECT queries specify a result set, but do not specify how to calculate it.

Explanation:

which protocol is used for secured web browsing. Correct Answer https Hyper Text Transfer Protocol Secure (HTTPS) is the secure version of HTTP, the protocol over which data is sent between your browser and the website that you are connected to. The 'S' at the end of HTTPS stands for 'Secure'. It means all communications between your browser and the website are encrypted.

Explanation:

The complexity of Bubble sort algorithm is Correct Answer O(n) Bubble sort has a worst - case and average complexity of О(n2), where n is the number of items being sorted. Most practical sorting algorithms have substantially better worst - case or average complexity, often O(n log n). When the list is already sorted (best - case), the complexity of bubble sort is only O(n). Class: Sorting algorithm Data structure: Array

Explanation:

To remove duplicate rows from the results of an SQL SELECT statement , the __ qualifier specified must be included. Correct Answer DISTINCT The SQL DISTINCT keyword is used in conjunction with the SELECT statement to eliminate all the duplicate records and fetching only unique records. There may be a situation when you have multiple duplicate records in a table. While fetching such records, it makes more sense to fetch only those unique records instead of fetching duplicate records. Syntax The basic syntax of DISTINCT keyword to eliminate the duplicate records is as follows − SELECT DISTINCT column1, column2,.....columnN FROM table_name WHERE [condition]

Explanation:

The operation of processing each element in the list is known as Correct Answer Traversal The operation of processing each element in the list is known as traversal. It refers to the process of visiting (checking and/or updating) each node in a tree data structure, exactly once.

Explanation:

Email is a protocol of the following layer. Correct Answer Application layer An application layer is an abstraction layer that specifies the shared communications protocols and interface methods used by hosts in a communications network. The application layer abstraction is used in both of the standard models of computer networking: the Internet Protocol Suite (TCP/IP) and the OSI model.

Explanation:

Which of the following data structures are indexed structures? Correct Answer linear arrays A linear array, is a list of finite numbers of elements stored in the memory. In a linear array, we can store only homogeneous data elements. Elements of the array form a sequence or linear list, that can have the same type of data. Each element of the array, is referred by an index set.

Explanation:

___ is a statement that is executed automatically by the system. Correct Answer trigger constraint A database trigger is what is executed automatically in response to certain events on a particular table or view in a database. It is mostly used to maintain the integrity of the database.

Explanation:

what does a COMMIT statement do to a CURSOR : Correct Answer None of these The COMMIT statement releases all row and table locks, and erases any savepoints you marked since the last commit or rollback. Until your changes are committed: You can see the changes when you query the tables you modified, but other users cannot see the changes.

Explanation:

which data structure is used for indexing Correct Answer stack The data structure most commonly used for database indexes are B - trees, a specific kind of self - balancing tree. A picture's worth a thousand words, so here's an example. The main benefit of a B - tree is that it allows logarithmic selections, insertions, and deletions in the worst case scenario.

Explanation:

The term push and pop is related to the Correct Answer stacks Considered as a linear data structure, or more abstractly a sequential collection, the push and pop operations occur only at one end of the structure, referred to as the top of the stack. This data structure makes it possible to implement a stack as a singly linked list and a pointer to the top element.

Explanation:

Trojan can be introduced through ? Correct Answer emails Description: Mostly Trojans are introduced via email attachments. These emails are disguised in a way that they look authentic. Once the user downloads the attached file and runs it, the file starts corrupting the system. A Trojan can also come as a payload with freeware and shareware available on the Internet.

Explanation:

An acronym for conference on Data systems languages is Correct Answer CODASYL CODASYL is an acronym for "Conference on Data Systems Languages". This was a consortium formed in 1959 to guide the development of a standard programming language that could be used on many computers.

Explanation:

The step by step instructions that solve a problem are called Correct Answer An algorithm A step - by - step procedure used to solve a problem is called Algorithm. An algorithm (pronounced AL - go - rith - um) is a procedure or formula for solving a problem, based on conduction a sequence of specified actions. A computer program can be viewed as an elaborate algorithm.

Explanation:

How many layer internet protocol suite? Correct Answer 5 TCP/IP protocol suite is made of five layers: physical, data link, network, transport, and application. The first four layers provide physical standards, network interfaces, internetworking, and transport functions that correspond to the first four layers of the OSI model.

Explanation:

which O/S is recommended for real time systems? Correct Answer Lynx OS Typical examples of real time operating systems are those custom written for the Galileo and Voyager space probes. Because of extreme power and weight constraints, they needed to be coded extremely efficiently to use as little memory and to accomplish their tasks in as few operations as possible.

Explanation:

what is the value of 'd' after this line of code has been executed ? double d = Math round ( 2.5 + math random () ); Correct Answer 3 The Math.random() method returns a number greater than or equal to 0 and less than 1 . Since we can then be sure that the sum of that number and 2.5 will be greater than or equal to 2.5 and less than 3.5, we can be sure that Math.round() will round that number to 3. So Option B is the answer.

Explanation:

which one of the following is not an example is not an example redundancy ? Correct Answer Data Center A data center, or data centre, is a building, dedicated space within a building, or a group of buildings used to house computer systems and associated components, such as telecommunications and storage systems.

Explanation:

According to Boolean algebra the value of (A + AB) (B + AB ) is Correct Answer AB The formula A + B + C + D will yield true (1) if at least one of A,B,C,D is 1. The formula A./B.C will be true only if A = 1, B = 0 (so /B = 1) and C = 1. Boolean algebra knows two distributive laws with operations AND and OR.

Explanation:

Compared to CISC. RISC processors (at the same clock ) are Correct Answer slower RISC - based machines execute one instruction per clock cycle. CISC machines can have special instructions as well as instructions that take more than one cycle to execute. ... The CISC architecture can execute one, albeit more complex instruction, that does the same operations, all at once, directly upon memory.

Explanation:

which of the following is not a type of web search engine? Correct Answer Portal There are 3 commonly known types of search engines that have been identified during various research projects: navigational, informational and transactional. There are three types of Search engines: Crawler - based searches. Human - powered directories. Hybrid searches.

Explanation:

what is the value of variable x after the following statement is executed in JavaScript? Var x2-'3'+'4'; Correct Answer Undefined undefined is a property of the global object. That is, it is a variable in global scope. The initial value of undefined is the primitive value undefined. In modern browsers (JavaScript 1.8.5 / Firefox 4 + ), undefined is a non - configurable, non - writable property, per the ECMAScript 5 specification. (Even when this is not the case, avoid overriding it.) A variable that has not been assigned a value is of type undefined. A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value. A function returns undefined if a value was not returned.

Explanation:

In Java , which operator is used to create an object Correct Answer class In Java, you create an object by creating an instance of a class or, in other words, instantiating a class. To create a new object, use Java's new operator. Here's an example using the new operator to create a Rectangle object (Rectangle is a class in the java. awt package).

Explanation:

Domain name to IP address mapping is done by_ Correct Answer DNS server Mapping a domain name to an IP Address is known as Name - Address Resolution. The Domain Name Server (DNS) Resolver performs this operation by consulting name servers. In order to find a particular DNS the requesting host place it's query to the Local DNS Server with a mapping request.

Explanation:

Distributed Queue Dual Bus is a standard for Correct Answer LAN & MAN Distributed - Queue Dual - Bus (DQDB) is a distributed multi - access network. provides access to Local Area Networks or Metropolitan Area Networks. supports connectionless data transfer, connection - oriented data transfer, and isochronous communications, such as voice communications.

Explanation:

which of the following will produce an answer that is closest in value to a double , d. while not being greater than d? Correct Answer (int)Math.Floor(d); Description The method floor gives the largest integer that is less than or equal to the argument. Syntax This method has the following variants − double floor(double d) double floor(float f) Parameters Here is the detail of parameters − A double or float primitive data type. Return Value This method returns the largest integer that is less than or equal to the argument. Returned as a double. Example Live Demo public class Test { public static void main(String args) { double d = - 100.675; float f = - 90; System.out.println(Math.floor(d)); System.out.println(Math.floor(f)); System.out.println(Math.ceil(d)); System.out.println(Math.ceil(f)); } } This will produce the following result − Output - 101.0 - 90.0 - 100.0 - 90.0

Explanation:

How many 'I's will be there in the binary representation of the following expression (assume 16 bit nubmber _ 12 + 64 + 128 + 256 + 1024 ) Correct Answer 6 In mathematics and digital electronics, a binary number is a number expressed in the base - 2 numeral system or binary numeral system, which uses only two symbols: typically “0” (zero) and “1” (one). The base - 2 numeral system is a positional notation with a radix of 2. Each digit is referred to as a bit.

Explanation:

It is not eas for a country with high fiscal deficits, high inflation, _____ banks and one that is __ to macro panics to completely open up its capital account . Correct Answer weak , prone Weak & prone both are adjective. In the question, "banks" is a Noun. Before it, adjective (weak) is appropriate according to meaning.

Explanation:

The ____ to e-buses would not lower the level of emissions but merely ___ their place of origin . Correct Answer transition, change The ____ to e - buses would not lower the level of emissions but merely ___ their place of origin. After 'the', Noun (transition) is used. After 'would', the present form of verb (change) is used.

Explanation:

"Assertive" people are generally more decisive . Correct Answer Confident assertive (adjective) having or showing a confident and forceful personality. "The job may call for assertive behaviour" Similar: confident, forceful, self - confident, positive, bold, decisive, assured.

Explanation:

People of "diverse " backgrounds now go to different places for pleasure, business or education. Correct Answer different diverse (adjective) showing a great deal of variety; very different. "A culturally diverse population" Similar: various, many and various, sundry, manifold, multiple, varied.

Explanation:

Computer has revolutionized offices procedures more than "any machine" of modern time Correct Answer any other machine বাক্যের Ajective (Superlative কে) যদি Comparative করতে হয় তবে any other বা all other ব্যবহার করে করতে হয়। সুতরাং বলা যায় Superlative এর অর্থ Comparative দ্বারা প্রকাশ করতে হলে Than এরপর Any other + Singular noun বা All other + plural noun বসাতে হয়।

Explanation:

কোন শব্দটির প্রয়োগ শুদ্ধ? সঠিক উত্তর উপলক্ষ্য উপলক্ষ্য - [বিশেষ্য পদ] প্রয়োজন, উদ্দেশ্য, অবলম্বন।

Explanation:

সমার্থক শব্দযোগে দ্বিরুক্তি হয়েছে কোনটিতে? সঠিক উত্তর ধন -দৌলত শব্দের দ্বিরুক্তি: ১. একই শব্দ অবিকৃতভাবে দুইবার ব্যবহৃত হয়ে দ্বিরুক্ত শব্দ গঠন করতে পারে। যেমন - ভাল ভাল বই, ফোঁটা ফোঁটা জল, বড় বড় বাড়ি, ইত্যাদি। ২. সহচর শব্দযোগে দ্বিরুক্ত শব্দ গঠিত হতে পারে। দুটি সম্পর্কিত শব্দকে সহচর শব্দ বলা যায়। যেমন, ‘কাপড় - চোপড়’ সহচর শব্দযোগে গঠিত দ্বিরুক্ত শব্দ। ‘কাপড়’ অর্থ গা ঢাকার জন্য যেসব পরা হয়। আর কাপড়ের সঙ্গে অনুষঙ্গ হিসেবে যেগুলো পরা হয় সেগুলোই ‘চোপড়’। অর্থাৎ, এই দুটি শব্দ পরস্পর সম্পর্কিত। তাই এই দুটি শব্দ সহচর শব্দ। এরকম - লালন - পালন, খোঁজ - খবর, ইত্যাদি। ৩. একই শব্দ দুইবার ব্যবহৃত হয়ে পরেরবার একটু পরিবর্তিত হয়ে দ্বিরুক্ত শব্দ হতে পারে। যেমন - মিট - মাট, ফিট - ফাট, বকা - ঝকা, তোড় - জোড়, গল্প - সল্প, রকম - সকম, ইত্যাদি। ৪. সমার্থক শব্দযোগে দ্বিরুক্ত শব্দ হতে পারে। যেমন - ধন - দৌলত, বলা - কওয়া, টাকা - পয়সা, ইত্যাদি। ৫. বিপরীতার্থক শব্দযোগেও দ্বিরুক্ত শব্দ গঠিত হতে পারে। যেমন - লেন - দেন, দেনা - পাওনা, ধনী - গরিব, আসা - যাওয়া, ইত্যাদি।

Explanation:

The supply of food and beverage for the program was abundant Correct Answer plentiful plentiful (adjective) existing in or yielding great quantities; abundant. "Coal is cheap and plentiful" Similar: abundant, copious, ample, profuse, rich, lavish, liberal.

Explanation:

'বিদিত' শব্দের বিপরীত শব্দ কী? সঠিক উত্তর অজ্ঞাত বিদিত শব্দের অর্থ পরিচিত; জ্ঞাত। সুতরাং বিদিত শব্দের বিপরীত শব্দ অজ্ঞাত।

Explanation:

কোন সন্ধিটি নিপাতনে সিদ্ধ? সঠিক উত্তর পর + পর = পরস্পর কতগুলো সন্ধি কোনো নিয়ম অনুসারে হয়না; এগুলোকে নিপাতনে সিদ্ধ সন্ধি বলে। কোনগুলো নিপাতনে সিদ্ধ সন্ধি তা জানার জন্য আমরা একটি কৌশল অবলম্বন করতে পারি। একাদশ বৃহস্পতি বারে তস্কর ও বনস্পতি পরস্পর গবাক্ষ চুরি করে আসছিলো, তখন ষোড়শী নায়িকা মনীষা ও তার অন্যান্য বান্ধবীদের সাথে দেখা হলো। নায়িকা আশ্চর্য হয়ে তার বান্ধবী পতঞ্জলিকে ডেকে বললো,”সখি এই কুলটারা কি কখনও নরকে যাবেনা“? উপরের বাক্যদ্বয়ে লাল কালি চিহ্নিত শব্দগুলো হচ্ছে নিপাতনে সিদ্ধ সন্ধি। এই সন্ধি গুলোর বিচ্ছেদ জেনে নেই। আ + চর্য = আশ্চর্য এক + দশ = একাদশ বৃহৎ + পতি = বৃহস্পতি তৎ + কর = তস্কর বন + পতি = বনস্পতি পর + পর = পরস্পর

Explanation:

বাংলা সাহিত্যে চলিত ভাষায় রচিত গ্রন্থ কোনটি? সঠিক উত্তর বীরবলের হালখাতা প্রমথ চৌধুরীর রচনাসমগ্র প্রবন্ধ গ্রন্থ তেল - নুন - লকড়ী (১৯০৬) বীরবলের হালখাতা (১৯১৬) নানাকথা (১৯১৯) আমাদের শিক্ষা (১৯২০) রায়তের কথা (১৯১৯) নানাচর্চা (১৯৩২) প্রবন্ধ সংগ্রহ(১৯৫২ ১ম খণ্ড ও ১৯৫৩ ২য় খণ্ড)[২] গল্পগ্রন্থ চার - ইয়ারী কথা (১৯১৬) আহুতি (১৯১৯) নীললোহিত (১৯৪১) "অনুকথা সপ্তক" "ঘোষালে ত্রিকথা"

Explanation:

কাঁদ + অন - কোন প্রত্যয়ের অন্তর্ভুক্ত ? সঠিক উত্তর কৃৎ প্রত্যয় কৃৎ প্রত্যয়→ ধাতু বা ক্রিয়া মূলের সাথে যে প্রত্যয় গঠিত হয় তাকে কৃৎ প্রত্যয় বলে । যেমনঃ - কাঁদন→√কাঁদ্‌ + অন, বাঁচন→√বাঁচ্ + অন, চলতি→√চল্‌ + তি. তদ্ধিত প্রত্যয়→ নাম বা সাধিত শব্দের শেষে যে প্রত্যয় যুক্ত হয়ে নতুন শব্দ গঠিত হয় তাকে তদ্ধিত প্রত্যয় বলে ।। যেমনঃ - থালা→থাল + আ, ডিঙা→ ডিঙি + আ, ঘামাচি→ঘাম + আচি.

Explanation:

Alam sold two vehicles for Tk. 46000 each . If he gained 10% on the first and lost 10% on another , then what is his percentage profit or loss in this transaction? Correct Answer 1% loss Let the profit be X% & loss be Y%. So, net profit/loss % = X + ( - Y) + X.( - Y)/100 (Negative sign denotes that there is a loss.) = 10 + ( - 10) + 10.( - 10)/100 = - 1 (Negative sign denotes that there is a net loss.) So, the net loss percentage is 1%.

Explanation:

A man can row 6 km / hr in still water. It the speed of the current is 2 km / hr , it takes 3 hrs more in upstream than in the downstream for the same distance . The distance is Correct Answer 24 km Speed of man in still water, x = 6 km/h Speed of current, y = 2 km/h Let distance = M According to question, Upstream time = Downstream time + 3 Or, M/4 = M/8 + 3 Or, 2M - M = 24 Or, M = 24 So, the distance is 24 km.

Explanation:

The respective ratio between the speed of a car , a train , and a bus is 5 : 9 : 4 . The average speed of the car, bus and train is 72 km / hr together . what is the average speed of the car and the train together? Correct Answer 84 km / hr Let the speeds of the car, train and bus be 5x, 9x and 4x km/hr respectively. Average speed = (5x + 9x + 4x)/3 = 18x /3 = 6x km/hr. Also, 6x = 72 = > x = 12 km/hr Therefore, the average speed of the car and train together is = ( 5x + 9x)/2 = 7x = 7 x 12 = 84 km/hr.

Explanation:

Three angles of a triangle are in proportion 5: 6: 7. Then what is the difference in degrees between he biggest and the smallest angles? Correct Answer 20° ATQ, 5x + 6x + 7x = 180 Or, 18x = 180 Or, x = 10 So, the difference in degrees between the biggest and the smallest angles = 70 - 50 = 20 degree.

Explanation:

A water tank has two taps ( Tap-1 and Tap-2) : Tap-1 can fill a tank in 8 hours and Tap-2 can empty the tank in 16 hours . How long will they take to fill the tank if both taps are opened simultaneously but Tap -2 is closed after 8 hours? Correct Answer 12 In 1 hr, the tank is filled = 1/8 - 1/16 = 1/16 In 8 hrs " " " " = 8/16 = 1/2 Now, 1/8 part is filled by tap - 1 in 1 hour 1/2 part is filled by tap - 1 in = 8/2 = 4 hrs So, the required time = 8 + 4 = 12 hrs

Explanation:

a motor -cycle covers 40 Km with a speed of 20 km /hr. Find the speed of the motor -cycle for the next 40 km journey so that the average speed of the whole journey will be 30 km / hr. Correct Answer 60.0km/hr Let the desired speed be x km/hr ATQ, 40/20 + 40/x = 80/30 Or, 1/20 + 1/x = 2/30 Or, 1/x = 1/15 - 1/20 Or, 1/x = (4 - 3)/60 Or, x = 60 So, the desired speed is 60 km/hr

Explanation:

12 marbles are selected at random form a large collection of white , red, green and yellow marbles . The number of marbles of each color is unlimited. Find the probability that the selection contains at least one marble of each color ? Correct Answer 3391 12 marbles are selected at random form a large collection of white , red, green and yellow marbles . The number of marbles of each color is unlimited. Find the probability that the selection contains at least one marble of each color ? This is same as W + R + G + Y = 12, where all are positive integers. Step I.. first, give one to each, hence 4 gone. Now you can distribute the remaining 8 to anyone as the restriction of at least one is done.. W + R + G + Y = 8..W + R + G + Y = 8.. Now, take this as 8 marbles and 3 partitions, so total 11 things. You can choose these 3 partitions in 11C3 ways = 11!/8!3! = 11∗10∗9/3∗2 = 11∗5∗3 Step II.. Total ways.. W + R + G + Y = 12 Now, take this as 12 marbles and 3 partitions, so total 15 things. You can choose these 3 partitions in 15C3 ways = 15!/12!3! = 15∗14∗13/3∗2 = 5∗7∗13 Probability = 11∗5∗3/5∗7∗13 = 33/91

Explanation:

A can finish a work in 5 days and B takes 4 days to do the same work . If the work is increased by 8 times, how many days will it take for both of them to finish the work if they work together? Correct Answer 20 days The work is increased by 8 times so the total work to be completed is [1 + 8 = 9] A completes 1/5 work in a day [ because he completes the work in 5 days] B completes 1/4 work in a day[ because he completes work in 4 days] So working together A&B completes 1/5 + 1/4 = 9/20 work in one day therefore the total increased work 9 will be completed in 20 days.