C++ | MCQs

Explanation

C++ and Java differ in their platform dependency, memory management, and use of classes.

C++ is platform dependent and needs to be compiled on every platform.

Java is platform-independent.

Once it's compiled into bytecode it can be executed on any platform.

Explanation

DRF: Digital Rights Foundation

DRF: Pakistani NGO

Most frequently mentioned platform in case of harassment was WhatsApp followed by Facebook.

Explanation

The valid output statement in C language among the given options is printf("Hello");.

In C programming, the printf() function is the standard library function used to display formatted output on the console.

It is part of the stdio.h header file, which needs to be included in your C program using #include <stdio.h>.

Options A, B, and C (display(), output(), print()) are not standard C library functions for outputting text to the console.

Explanation

The control bus is a crucial component of a computer system that communicates with other elements, such as the CPU, memory, and input/output devices.

Its primary function is to transmit control signals.

Explanation

A passive topology means that devices on the network simply listen for signals and do not actively amplify or forward the signal along the network.

The Bus topology is a classic example of this.

Where data is transmitted directly on the shared cable without any intermediary device actively boosting the signal

Explanation

Printer is an output device because it produces a hard copy of digital data.

Mouse, Scanner, and Keyboard are all input devices used to send data to the computer.

Explanation

do-until is not a valid loop structure in C programming.

C provides for, while, and do-while loops for iteration.

Explanation

The conditional operator (? :) is a shorthand for the if-else statement.

It evaluates a condition and returns one value if true, another if false.

Explanation

The format specifier %c is used in scanf to read a single character.

So, km must be a character variable, e.g., char km;.

Explanation

r is the carriage return escape sequence, which moves the cursor to the beginning of the current line.

It does not move to the next line, unlike n (newline).