22C:21 Computer Science II: Data Structures
Quiz 1B (15 Minutes)
Some questions have more than one correct answers; please select all
(Open book and notes; no computers)
September 2, 2010
2 Which of the following are correct ways to declare
variables?
A. int length; int width;
B. int length, width;
C. int length; width;
D. int length, int width;
4 To declare a variable MAX_LENGTH inside a
method with value 99.98, you write
A. int MAX_LENGTH = 99.98;
B. float MAX_LENGTH = 99.98;
C. double MAX_LENGTH = 99.98;
D. long MAX_LENGTH = 99.98;
6 What is the result of 45 / 4?
A. 10
B. 11
C. 11.25
D. 12
8 25 % 1 is _____
A. 1
B. 2
C. 3
D. 4
E. 0
10 24 % 5 is _____
A. 1
B. 2
C. 3
D. 4
E. 0
12 To add a value 1 to variable x, you write
A. 1 + x = x;
B. x += 1;
C. x := 1;
D. x = x + 1;
E. x = 1 + x;
14 To add number to sum, you write
A. number += sum;
B. number = sum + number;
C. sum = Number + sum;
D. sum += number;
E. sum = sum + number;
16 Suppose x is 1. What is x after x -= 1?
A. 0
B. 1
C. 2
D. -1
E. -2
18 What is x after the following statements?
int x = 1;
x *= x + 1;
A. x is 1.
B. x is 2.
C. x is 3.
D. x is 4.
.
20 Are the following four statements equivalent?
number += 1;
number = number + 1;
number++;
++number;
A. Yes
B. No
