【题目】 The abbreviation FPGA stands for Field ________Gate Array.

1、[单选题]People who gain unauthorized access to a computer system for malicious purposes are called _______.

• A、Hackers
• B、Crackers
• C、breakers
• D、intruders

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2、[单选题]The gray scales present in a digital image can be summarized by its _______.

• A、graph
• B、schematic
• C、histogram
• D、diagram

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3、[单选题]Confidentiality of the message is not enough in a secure communication; ________ is also needed. The receiver needs to be sure of the sender’s identity.

• A、encryption
• B、authorization
• C、authentication
• D、encapsulation

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4、[单选题]Whereas the decimal system is based on 10, the ________ system is based on 2. There are only two digits in the latter system, 0 and 1.

• A、bilateral
• B、binary
• C、byte
• D、bit

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5、[单选题]The abbreviation JPEG stands for Jointed Picture _______ Group.

• A、Experts
• B、Expert
• C、Engineers
• D、Engineer

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