29. What is the value of counter after the foliowing statements execute? counter = 1; while (counter < 30) counter E 2 * counter; a, 16 C. 64 b. 32 d. 53 30. Suppose sum and num are int variables, and the input is 15 18 20 -1 What is the output of the following code? (ASsume that console is a Scanner object initialized to the standard input device.) sum = console.nextInt () ; num = console.nextInt (); while (num = -1) num = console.nextInt (): sum = sum + num; System.out.println (sum); a, 34 C. 52 b. 35 d. 53

29. What is the value of counter after the foliowing statements execute? counter = 1; while (counter < 30) counter E 2 * counter; a, 16 C. 64 b. 32 d. 53 30. Suppose sum and num are int variables, and the input is 15 18 20 -1 What is the output of the following code? (ASsume that console is a Scanner object initialized to the standard input device.) sum = console.nextInt () ; num = console.nextInt (); while (num = -1) num = console.nextInt (): sum = sum + num; System.out.println (sum); a, 34 C. 52 b. 35 d. 53

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Control structures

Control structures are block of statements that analyze the value of variables and determine the flow of execution based on those values. When a program is running, the CPU executes the code line by line. After sometime, the program reaches the point where it has to make a decision on whether it has to go to another part of the code or repeat execution of certain part of the code. These results affect the flow of the program's code and these are called control structures.

Switch Statement

The switch statement is a key feature that is used by the programmers a lot in the world of programming and coding, as well as in information technology in general. The switch statement is a selection control mechanism that allows the variable value to change the order of the individual statements in the software execution via search.

Question

29. What is the value of counter after the following statements execute?
counter = 1;
while (counter < 30)
counter = 2 * counter;
a, 16
b. 32
o 64
d. 53
30. Suppose sum and num are int variables, and the input is
15 18 20 -1
What is the output of the following code? (Assume that console is a Scanner object initialized to the
standard input device.)
sum = console.nextInt () ;
num = console.nextInt ();
%3D
%3D
while (num != -1)
{
num = console.nextInt();
sum = sum + num;
}
System.out.println (sum);
c. 52
d. 53
a,
34
b. 35
3

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