Computer Terminology

Correct Answer: C

console.log(false == 0) prints true because '==' performs type coercion, and false coerces to 0, so 0 == 0 is true. console.log(false === 0) prints false because '===' checks both value and type, and a boolean is never strictly equal to a number.

Correct Answer: B

Start value = 0. Increment by +2 each time. Iterations: 1 -> 2; 2 -> 4; 3 -> 6; 4 -> 8; 5 -> 10. After 5 iterations, value reaches 10 (limit). It should not exceed 10, so we stop here. Total iterations = 5.

Correct Answer: D

An if statement checks a condition and executes once if it is true. It does not loop repeatedly, unlike for, while, or do-while loops. It effectively stops after the first true condition is evaluated.

Correct Answer: A

The syntax is already correct, so the issue is not in the code. Browsers support only certain formats like MP4, WebM, or OGG.

Correct Answer: C

System.out.println() is a Java statement used to print output to the console. C++ uses cout << "Hello World";. Python uses print("Hello World"). JavaScript uses console.log("Hello World");. This syntax is specific to Java's standard output system.

Correct Answer: A

Pandas is a Python library for data manipulation and analysis. The standard import statement is: import pandas as pd. NumPy is for numerical computations, Matplotlib is for data visualization, and Scikit-learn is for machine learning.

Correct Answer: B

In JavaScript, arrays are declared using square brackets [ ]. Each element inside the brackets is separated by a comma (or spaces in simplified options). Parentheses ( ), curly braces { }, and angle brackets < > are not used for arrays.

Correct Answer: B

MongoDB is a NoSQL document database that stores data in JSON-like documents. It is ideal for large volumes of unstructured or semi-structured data like logs. Unlike SQL databases (MySQL, Oracle, SQL Server), it does not require a fixed schema.

Correct Answer: C

The initial value of x is 5. The if condition x > 3 is true. The statement x += 2 is executed, so x becomes 7. The else block is skipped, resulting in an output of 7.

Correct Answer: B

NumPy is a Python library for numerical computation and array operations. It provides fast mathematical functions for large datasets. Many machine learning libraries like TensorFlow and Scikit-learn use NumPy arrays internally.

Correct Answer: C

In C++, false is evaluated as 0 in arithmetic operations. Therefore, b + 2 becomes 0 + 2 = 2.

Correct Answer: B

&& has higher precedence than ||. a && b evaluates first, which gives 0 (since b is 0). Then, a || 0 is evaluated, which gives 1 (since a is 1). The final output is 1.

Correct Answer: C

A loop inside another loop is called a nested loop. If both loops run n times, the inner loop runs n times for each iteration of the outer loop. Total iterations = n * n = n^2, giving a time complexity of O(n^2).

Correct Answer: A

In arrays or lists, unshift adds a new element to the start of the structure. The existing elements are shifted one position to the right to make space.

Correct Answer: A

In arrays or lists, shift removes the first element. The remaining elements are shifted one position to the left to fill the gap.

Correct Answer: B

In stack or list data structures, push is used to add an element to the top of the stack or the end of the structure.

Correct Answer: B

In a stack, pop removes the element from the top (the last element added). Stacks follow the LIFO (Last In, First Out) principle.

Correct Answer: A

The ls command in Linux is used to list all files and directories in the current directory. cd changes directories, mkdir creates a directory, and rm deletes files.

Correct Answer: B

Round Robin (RR) is a CPU scheduling algorithm that assigns each process a fixed time slice called a time quantum. It is a preemptive scheduling algorithm.

Correct Answer: A

Bubble Sort has an average and worst-case time complexity of O(n^2) due to nested passes over the array.