Questions IPA Japan published in 基本情報技術者試験 科目Bのサンプル問題, translated into English, with IPA's answers. ITPEC is based on the same exams, so they are good practice for ITPEC too.
From the answer group below, select the correct answer to be inserted into blank in the program.
The admission fee of a certain facility is 100 yen for ages 0 to 3, 300 yen for ages 4 to 9, and 500 yen for ages 10 and above. The function fee receives an integer of 0 or more that represents an age as its argument and returns the admission fee.
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From the answer group below, select the correct combination of answers to be inserted into A and B in the program. Here, the array index starts at 1.
The following program reverses the order of the elements of the integer-type array array.
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From the answer group below, select the correct combination of answers to be inserted into A and B in the program.
The procedure append adds the character given as the argument to a singly linked list. Each element of the singly linked list is represented by the class ListElement. The figure shows the explanation of the class ListElement. ListElement-type variables store references to instances of the class ListElement. The global variable listHead stores a reference to the head element of the singly linked list. When the list is empty, listHead is undefined.
Figure Explanation of the class ListElement
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From the answer group below, select the correct combination of answers to be inserted into A through C in the description. Here, the array index starts at 1.
A matrix in which most of the elements are 0 is called a sparse matrix. The following program converts a matrix stored in a two-dimensional array into a data structure suitable for storing a sparse matrix, in order to reduce the amount of data of the matrix.
The function transformSparseMatrix converts the matrix given as a two-dimensional array in the argument matrix into an array of integer-type arrays, and returns it. When the function transformSparseMatrix is called as transformSparseMatrix(, the return value is {{A}, {B}, {C}}.
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From the answer group below, select the correct answer to be inserted into blank in the program.
This is a program that, for any two different characters c1 and c2, calculates the ratio at which c2 appears immediately after c1 in the English words contained in a group of English words. English words consist of lowercase English letters only. When the last character of an English word is c1, that position is not included in the calculation of the ratio. For example, in the group of English words consisting of the four English words “importance,” “inflation,” “information,” and “innovation” shown in the figure, let c1 be “n” and c2 be “f”. Other than the last characters of the English words, there are five “n”s, and of these, two have “f” as the next character. Therefore, the ratio to be calculated is 2 ÷ 5 = 0.4. When the sequence of c1 and c2 never appears, the ratio is defined as 0 regardless of the number of occurrences of c1.
Figure Example of a group of English words consisting of four words
In the program, the group of English words is stored in the Words-type global variable words. The table shows an explanation of the methods of the class Words. In this question, the operator “+” for strings represents the concatenation of strings. Also, the operator “÷” for integers performs the calculation as real numbers.
Table Explanation of the methods of the class Words
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Company A, a manufacturer, sells products to individuals by using an EC site (hereinafter, Company A’s EC site is referred to as site A). On site A, Company A’s products and services can be searched, and site A has a login function and manages information such as the names and email addresses (hereinafter, member information) of individuals who have registered in advance to use site A (hereinafter, members). Site A runs on Company B’s PaaS, and uses the DBMS and the application server on the PaaS.
Company A outsources the development and operation of site A to Company C. The outsourcing contract between Company A and Company C states that Company C implements the countermeasures against vulnerabilities in the Web application programs.
Recently, an incident occurred in which a vulnerability in a Web site operated by another company in the same industry as Company A was exploited and personal information was leaked. Therefore, Company A requested Company D, which provides security assessment services, to perform a vulnerability assessment of site A. As a result of the vulnerability assessment, multiple security vulnerabilities that require countermeasures were pointed out. Figure 1 shows the findings from Company D.
Figure 1 Findings from Company D
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