Peer Instruction: Unit 2 Multiple Choice Questions¶

2-14-1: What is stored in the variable name after the following line of code is executed?

String name = "Bob";

“Bob”
Incorrect! name stores the string Bob, not including the quotes.
Bob
Correct! Bob is stored in the variable name after the code is executed.
The address in memory where “Bob” is stored
Incorrect! The address in memory is not stored in the variable name. Instead, the string Bob is stored.
new String(“Bob”)
Incorrect! Bob is stored in the variable name after the code is executed, not new String("Bob")

2-14-2: Match the scenario to the constructor call.

1-A, 2-C, 3-C, 4-D
Incorrect! Scenario 1 creates a picture from "filename.jpg." Scenario 2 uses 'other' as the picture that it is copying. Scenario 3 uses aNum and bNum to determine the dimensions of the image. Scenario 4 uses aNum and bNum to set the width and height as the same dimensions as another image.
1-B, 2-B, 3-A, 4-D
Incorrect! Scenario 1 creates a picture from "filename.jpg." Scenario 2 uses 'other' as the picture that it is copying. Scenario 3 uses aNum and bNum to determine the dimensions of the image. Scenario 4 uses aNum and bNum to set the width and height as the same dimensions as another image.
1-A, 2-C, 3-D, 4-D
Incorrect! Scenario 1 creates a picture from "filename.jpg." Scenario 2 uses 'other' as the picture that it is copying. Scenario 3 uses aNum and bNum to determine the dimensions of the image. Scenario 4 uses aNum and bNum to set the width and height as the same dimensions as another image.
1-B, 2-C, 3-D, 4-D
Correct! Scenario 1 creates a picture from "filename.jpg." Scenario 2 uses 'other' as the picture that it is copying. Scenario 3 uses aNum and bNum to determine the dimensions of the image. Scenario 4 uses aNum and bNum to set the width and height as the same dimensions as another image.